Regulations Governing Securities Investment Trust Funds Article 21

A SITE may offer or privately place funds denominated in foreign currencies except where otherwise provided by the FSC; subscriptions, redemptions, and fee payment for such funds shall be denominated in a currency designated by the SITE. Following its designation, the SITE may not arbitrarily change the designated currency.
中文原文 證券投資信託基金管理辦法(931030訂定)第21條
證券投資信託事業除本會另有規定外,得募集或私募以外幣計價之基金,其申購、買回以及所應付相關費用,應以證券投資信託事業所選定之外幣計價,其選定後,不得再任意變更。

English translation for reference only; the Chinese text prevails. Not legal advice.